Patent Number: 6,298,139

Title: Apparatus and method for maintaining a constant speech envelope using variable coefficient automatic gain control

Abstract: An apparatus and method for maintaining a constant speech envelope using automatic gain control, wherein the level of the audio signal is monitored. If increasing, a first level of gain increase is applied to the gain signal. If decreasing, a second level of gain decrease is applied to the gain signal, the second level being less than the first level. By applying a lower level of change to the gain signal when it is seen as decreasing, a more constant speech envelope is obtained during gaps and interstices in the analog signal that are common in speech.

Inventors: Poulsen; Steven P. (Lincoln, NE), Preston, II; James P. (Lincoln, NE)

Assignee: Transcrypt International, Inc.

International Classification: H03G 1/00 (20060101); H03G 7/00 (20060101); H03G 7/06 (20060101); H03G 3/30 (20060101); H03G 003/00 ()

Expiration Date: 10/02/2018